Remote control radio receiving system



Oct. 13, 1931. A. M. TROGNER REMOTE CONTROL RADIO RECEIVING SYSTEII 2 Sheets-Shen 1 Filed lMarch 26. 1929 OIIIIOI ---www wmvw.-- .539

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A TTORNEY Oct. 13, 1931.

A. ML TROGNER REMOTE CONTROL RADIO RECEIVING SYSTEM Filed Mach 26, 1929 2 Sheets-Sheet 2 IN V EN TOR.

` TToRNEY Patented Oct. 13, 1931 UNITED STATI-:s

PATENT OFFCE ARTHUR M. TROGNER, OF EAST ORANGE, NEW' JERSEY, ASSIGNOR TO WIR-EI) RADIO, INC., 0F NEW YORK, N. Y., A CORPORATON 0F DELAWARE REMOTEy CONTROL RADIO RECEIVING SYSTEM Application filed March 26, 1929. Serial No. 351096.

My invention relates 'broadly to remote control radio receiving systems generally and more particularly to remote control of radio receivers where the frequency characteristics 5 of the receiving set are adjusted at a position remote from the receiver. y

One of the objects of my invention is to provide a remote control receiving system wherein a yplurality of radio receivers may 1o be individually adjusted from a remotely poi sitioned control unit.

Another object of my invention is to provide a remotey control receiving system in which a plurality of radio receivers are indi- 15,' vidually adjusted from a remotely positioned control unit and wherein the frequency adjustments of each receiver may be positively ascertained at such remote position.

Other and further objects of my invention 80 are to provide a minimum of interconnect- 1 ing wires between the radio receivers and the control unit and to provide a system which is easy to operate. My invention will be more fully understood from the specification hereinafter fol- Ag lowing and by reference to the accompanying drawings, wherein:

Figure 1 is a` schematic circuit diagram showing the remote control radio receiving so system of my invention; and Fig. 2 is a simplified diagrammatic illustration of the re'- mote control radio receivingsystem of my invention.

y In my copending application Serial No. 345,854, is described a remote control radio receiving system similarin certain respects to the arrangement described and illustrated herein, the present arrangement possessing certain improvements and modifications not shown in my earlier application mentioned. It is oftentimes desirable if not necessary to place the radio receiving set at a considerable distance from the place where control of the receiver is desired. This isy especially true where interference from other transmittersor from sources of industrial interference would 'not permit satisfactory reception otherwise. The remote control radio receiving system of my invention avoids many disadvantages inherent in other systems and presentsmany advantages in simplicity and eiiiciency not experienced in systems of the type heretofore employed.

In Fig. 1 of the drawings two individual receiving sets are controlled by remote means. The two are designated as receivers A and B. o Receiver A comprises thermionic tubesl, 2 and 3. The input circuit of thermionic tube 1 includes inductance 6 and capacity S. lnductance 6 and capacity 8 are djustably controlled by mechanical mem- Inductance 6 is inductively coupled with inductance 4a, the latter being connectedV to a space radio energy collecting system comprising antenna 4 and ground 5. An audio frequency oscillator 9 employs a thermionic tube having an input circuit comprising inductance 10 and capacity 12. Capacity 12 is adjustably controlled in common with the control of capacity 8, by mechanical member-7 actuated by motor 13. Motor 13 has a field winding 14. Theconnections of the armature and field windings` are controlled by polarity reversing switch 25, 26, 27. A commutator 25 is actuated by a ratchet and pawl movement, the pawl'actuated by armature 26 causing the movement of commutator 25 only on the forward stroke of the armature 26. The forward stroke of armature 26 is eiiiected by theattraction of electromagnet 27. Oscillator 9 is coupled to transmission line 17 by capacity 16. A polarized relay comprising electromagnet 30, armature 31 and contact members 32, 33 controls the energization of electromagnet 27 of the polarity reversing switch. Audio frequency energy is excluded from electromagnet 30 by means of audio frequency choke coil 15. ,Time delay relay 36 opens and closes the energization circuit of oscillator 9 and may provide for deenergizing the oscillatory a predetermined time after the last tuning operation.

The arrangement of receiver B- is similar to that of receiver A- Space radio collecting system 4b, 4c and 5 is inductively coupled with inductance 6a included in the input circuit of thermionic tube 1a. Thermionic tubes 2a and 3a are coupled with the amplifier 100 circuit arrangements. The frequency characteristics of oscillator are controlledy in common with the adjustment of capacity 8d and inductance Ga by a common nieclianicl member 7 a. The frequenc,`- range of oN lator 9a should he entirely dilferent from the range of oscillator 9, and there should no even any close harmonic relationship bel-` the two.

Member 7d is act-nA tnl tor 13a has a field w,u with polari The geneiawed audio frequency energy oscillator' 9a is transmitted to line 17 by means of capacity 16a connected with inductanre a. Theene ejizat-ion of oscillator 9a is controlled bv time delay r l En tion of electremagent 2.o of the poA reversing switch is controlled by polarirerl relay 30, 31.32, the contact 32 connecting 'ith armature 31.

Transmission wires 17. 17.11, and 177i are connected with receivers A and B and to the distant control unit. The circuit for controlling the frequency` characteristics of the unit comprising ther' iionic tube 1. and oscillator 9, and the unitcomprising thermionie tube 1a and oscillator includes line wire 17 and a common ground circuit 5. l wires 170.'r and 17o carrythe signaling ener from receivers A and B respectivelj'. The distant control unit comprises reproducing means 23 and 23a, audio frequency indicati-nler meters 21 and 21a. condenser-s 22 and 220,4. polarity reversing switch 20. source of energy 19 and audio frequency choke coil 18. With both receivers A and B in operation` the received signaling energy is reproduced in reprod .cers 23 and 23a respect-ively. The generated signaling energyv of oscillators 9 and 9a transmitted over line wire 17. At the vdistant control unit, audio frequency meter 21 indicates the iequenoi,v adjustment of receiver e since the frequency characteristics. of oscilla-tor 9 are controlled incommon with adiustments in the frequency chara cteristies of the input circuit of thermionic tube 1.

ln lile marmer meter 21a indicates the frequency adjustment of receiver B in terms of the frequency adiustmentl of oscillator 9o. Condensers 22 and 22a prevent direct current from reaching the meters 21 and 21a, permitting however low frequency impulses to pass. Polarity reversing switch is adapted to apply potential source 19 between line wire 17 and ground 5 with either po larity.

Figure 2 shows a simplitied diagrammatic iilustration of the remote control radio receiving system of n invention. Reference characters shown in Fie'. correspond to those employed in ld ig. l. Signal energy transmission wires 17a ano 175 are not shown in this illustration. Receiver A and rev motor 13a.

is 1l connected recesso ceiver B having frequency adjusting elements El and da respectively are adjusted by ti `@eration of motors 13 and 13a respec tively. The frequency characteristics of 0scillators 9 and 9a are controlled by frequency adjusting elements 12 and 12a cooperatively actuated with elements S and 8a respectively. rlhc generated audio frequency energy of oscillators 9 and 9o is transmitted to line wire 17 by means or coupling condensers 16 and tijd respectively. Polarized relay 30, 31, 32, and lll controls the-energization of electromagnetic reversing switch 25, 26, 27, or of switch 25a, 2Go, 27o, depending on the position or armature 3l, and whether contact is 'nn-'rdc f'ithmember or This selectivity is controlled hy the polarity of theV source ener electromagnet 3U. Reversing switches 25, 2G, 27, -and 25a, 26a and 27a arc adapted to reverse the connections of the armature and iield windings of the motors connected with the respective switches, the pawls actuated by arms 2(5.and 26a moving coimnututors and 25a respectively always in the same direction.

Alternate segments of commutators-are interconnected to ell'ect the desired reversal of connections. 'Time limit or time delay switches 36 and 36a are adapted to energize and decnergize oscillators 9 and 9a and to deonergize the oscillators a predetermined time after the last. tuning operation. Audio frequency choke coil 15 prevents the generated energy from oscillators 9 and 9a from reaching tne relays and reversing mechanism. Transmission wire 17 leads to the remote control unit. The generated audio frequency energy from oscillators 9 and 9a passes the condensers 22 and 22a, actuating audio frequency indicating meters 21 and 21a respectively. utlio 'trequencychoke coil 18 prevents the audio frequency energy from reaching switch 200i and sources 19, 19a. Switch 20a as here shown is a single-pole, double throw switch while that shown in Fig. 1 is of the double-pole, double-throw design. Sources 19 and 19a are adapted to control the energization of polarized relay 30, 31, 32, 33, armature 3l contacting with member 32 or with member according as switch 20a connects source 19 or source 19a with the line 17. Armature 31 returns to neutral position when switch 20a 'is in the neutral position. The reversing s\ 'itches 25, 26, 27 and 26a, 7a are selectively energized depending upon the position of switch 20a at the remote control unit. In operation, switch 20a is moved. let us say to connect source 19a to line 17 land ground. 5. Electromagnet is energize-.fl and armature 3l contacts with member 32. This energizes electromagnet 27a and energv is supplied to motor 13a. The commutatoru25a is moved a sufiicient amount to reverse the connections of motor 13a from their previous condition thereby causing the direction C-IX of rotation of motorl'fa to be the reverse of its pr vious operation.

This dlrection of rotation mayat this time `be such as to cause a progressive increasefin the frequency adjustment of element 8a. A similar change in the adjustment of member 12a is likewise effected.) Because of time limit relay 36a being energized simultaneously with the energization of relay 30, 31, 32, 38, the audio frequency oscillator 9a is energized. The generated i energy from oscillator 9a is transmit-ted to line 17 and to the remote control unit where frequency meter 21a indicates tlieprogressivc yincrease of frequency. If switch 20a is now opened, electromagnet is deenergized which indirectly causes motor 13a to stop. Relay 36a is also deenergized thereby deenergizing oscillator 9a. If source 19a is again connected with line 17 by switch 20a, the operation of polarized relay 30, 31, 32, 33 is the same as is also reversing switch 25a, 26a, 27 a. Commutator 25a reverses the connection of the windings of motor 3a and hence causes the direction of the motors operation to be reversed. This would cause a decrease in the frequency characteristics of element 8a, and also of element 12a, and the progressive n decrease would be indicated on meter 21a.

The operation of receiver A is similar to the operation of receiver B just referred to. Switch 20a is moved to the opposite contacting position with source 19 thereby causing a reversal of the polarity of the source energizing electromagnet 30. This causes the energization of motor 13 and the actuation of reversing switch 25,26, 27.

Progressive adjustment of elements 8 and 12 indicated by meter 21 at the distant control unit. Reversal of the adjustment either increasing or decreasing the frequency characteristics is accomplished by opening the switch 20a and again closing the same to make connection with source 19. The progressive change in the frequency adjustment is indicated by meter 21.

Many modifications of my invention are possible. Receiving rsets with any number of controls may beadjusted, the receiving sets having any desired circuit arrangements other than those shown in the drawings. Any number of receivingsets may be controlled in a manner similar to that described herein, each of the receivers being provided with an audio frequency oscillator having a frequency range differing each from the other. The frequency range of the oscillator circuits should be widely different. Telephone receivers are illustrated, however, it is obvious that loud speakers either with or Without amplifiers may be employed. The polarity reversing switch indicated at 25, 26 and 27 may be of a design other than that illustrated.

I realize that many modifications of my in` vention are possible without departingfrom the spirit of my invention and it is to be understood that the embodiments of my invention shall not be restricted byl the foregoing specification or by the accompanying drawings but only by the scope of the apl)ended claims.

What I claim as new and desire to secure by Letters Patent of the United States is as follows:

1Q A remote control radio receiving system comprising in combination a plurality of radio receivers having individual frequency adjusting means actuated by individual electric motors, individual audio frequency oscillators having frequency adjusting means actuated in common with the frequency adn justing means of said receivers respectively, a remote control unit adapted to selectively energize said motors, individual frequency indicating means at said remote control unit and a single control circuit extendingv be'- tween said receivers and said control unit and carrying control currents and audio frequency currents whereby the adjustments of said receivers may be ascertained in terms of the frequency adjustments of said oscillators.

2'. In a remote control radio receiving system, a pair of radio receiving sets, individual tuning controls for each of said sets, a pair of audio frequency oscillators of different frequency ranges, frequency varying means for each of said oscillators, individual means for actuating the frequency varying means of each of said oscillators cooperatively with thetuning controls of said'receiving sets respectively, a separate reversible motor for driving each of said individual means, an electromagnetic reversing switch for each of saidmotors adapted to reverse the polarity of the potential applied to said motor with each impulse applied to its control winding, a polarized relay having contacts connected to each of said switches respectively, a remote controlV station for said receiving sets comprising a switch, a source of control potential, a pair of frequency meters respectively adapted to cover the frequency ranges of said audio frequency oscillators, and a single common control circuit connecting said remote control station to said receiving sets and oscillators, whereby each of said receiving sets may be selectively tun-ed from said control station, and thetuning of each of said receiving sets is positively indicated at said control station.

3. Ina remote control radio receiving system, a pair of radio receiving sets, individual tuning controls for each of said sets, a pair of audio frequency oscillators of different frequency ranges, frequency varying means for cach of said oscillators', individual means for actuating the frequency varying means of each of said oscillators cooperatively with the tuning controls of said receiving sets respectively, a separate reversible motor for fit fit

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eacli impulse applied to its cont-roly Winding,

a polarized relay liaving'contacts connected to each of said switches respectively, remote control station for said receiving sets coinprising asWitcli, a source oi' control potential,

a pair of frequency meters respectively adaijited to cover Yne frequency ranges of said aucio frequency oscillators, andv a single common control circuit connecting said remote control station said receiving sets and oscillators, individual circuit elements connected for electrically isolating said motors from saidl oscillators, individual circuit elements connected for electrically isolating said frequency meters from said source of control potential and saidV sWitcl l whereby each of saidv receiving setsmay be selectively tuned from said control station, and the tuning of eachl ot'- said rece' fing sets is positively indicated at said control station.

4. In a remote control radio receiving systeni,` a translatingr station, a control station, said translatingr station comprising tvvo tuning controls to be selectively actuated, a pair of'audio'frequency oscillators of diiferent frequency ranges, frequency varying means for eacli of saidl oscillators, individual means for actuating the frequency varying means of eacli of said oscillators cooperatively with eacli of said timing controls respectively, a separate reversible motor for driving eaclr of said individual means, means for reversing the` direction of rotation of each of said 1notors, a polarized relay having its contacts connected for selectively actuating each of said reversing means, said control station comprising a. switch, a source of controlpotent-ial, and a pai-r of frequency meters of ranges corresponding respectively to each of said oscillators, and a single common control circuit between said translating station and said control station, whereby each of said receiving sets may be selectively tuned from said control station, and the tuningr of each of said receiving sets is positively indicated at said control station.

5. In a remote control radio receiving systcm, a translating station, a control station, said translating station comprising tWo tuning controls to be selectively actuated, a pair of audio frequency oscillators ot different frequency ranges, frequency varying means for each of said oscillators, individual means for actuating tlie frequency varying means of each of said oscillators cooperatively with eacli ot said tuning controls respectively, a sepa-rate reversible motor for driving each of said individual inea-ns, means for reversing the direction of rotation of each of said motors, aA polarized relay having its contacts conneeted for selectively actuating each of said monja-w reversing means, said control station colnprising a switch, a source of' control potential', and a pair of frequency meters, of ranges corresponding respectively to each. ofsaidos.- cillators, and a singlecommon control circuit between said translating station and sai'dcontrol station, individual circuit elements, connected for electrically isolating-y saidv motors from said oscillators, individuaL circuit elements connected for electrically isolating said frequency meters from said source of control potential and said' switch,.wl`1ereby each of said receiving sets may be selectively tuned from said controly station, and the tuning of each of said receiving sets is positively indicatedV at saidcontrol station.

ARTHUR M.. TROGNER. 

